George f



G. F. WHEELER.

COMPASSES.

APPLICATION FILED sans. 1915.

1,1 95,887. PfIIenIedAug. 22,1916.

UNTE STATES PATENT FFCE.

GEORG-E F. WHEELER, 0F LILYDALE. SASKATCHEWAN, CANADA.

COMPASSES.

Original application filed October 20, 1914, Serial No. 867,680.

To ZZ whom t may cof/wem.'

Be it known that I, GEORGE F. lVHEnLnR, subject of the King of Great Britain, residing at Lilydale, in the Province of Saskatchewan and Dominion of Canada, have invented certain new and useful Improvements in Compasses, of which the following is a specification.

rfhis invention contemplates an improved compass being a division of my pending application for combined marking gage and compass, iiled Get. 20, 1914, Serial No. $67,680.

The invention has as its primary object to provide a device of this character which will be simple in construction and which may be easily held when operated.

The invention has as a further object to provide a compass which may be readily adjusted and wherein the several parts thereof may, if desired, be easily disconnected from each other, so that the device may be repaired with facility. And a still further object of the invention is to provide an improved device of this character employing a rotatable marking element and to also provide an adjustable mounting for the said element which may be operated to hold the element fixed, so that the said element may then act as a scorer.

Other and incidental objects will appear as the description proceeds and in the drawing wherein l have illustrated the preferred embodiment of the invention and wherein similar reference characters designate corresponding parts throughout the several views, Figure 1 is a perspective view of my improved compass, Fig. 2 is a fragmentary top plan view of the slide of the compass, Fig. 3 is a vertical sectional view more particularly showing the mounting of the adjusting screw for the slide, Fig. 4 is a fragmentary horizontal sectional view showing the mounting of the marking element.

In carrying out my invention, I employ a fiat bar 10, the upper side of which is preferably provided with a scale. Adjacent one end, the bar is laterally enlarged and is formed with an opening having portions thereof extending at substantially right angles to each other. Mounted in said opening is a marking element 11 in the nature of a metal disk which is provided with trunnions 12 and 13, The trunnions are ar- Speccation of Letters Patent.

Patented Ano". 22, 1916.

Bvided and this application filed September Serial No. 49,798.

ranged to extend longitudinally of the bar and the trunnion 12 is provided with a conical-end rotatably received within a suitable recess formed in the adjacent end wall of the opening receiving the trunnions. Screw threaded to the adjacent end of the bar is a longitudinally extending set screw 14 havlng a conical inner end rotatably tting within a suitable recess formed in the adj acent end of the trunnion 13. Screw threaded upon the set screw 14, is a locking nut 15.

It will now be observed that the disk of the marking element is arranged transversely of the bar and is rotatably mounted thereon. By properly adjusting the screw 14, the marking element may be locked in fixed position, as will be readily understood, so that it may be used to score the work.

Slidably mounted upon the bar 10 is a sleeve 16 upon the lower face of which is formed a boss 17. Screw threaded into the said boss is a pin or stud 18 arranged to extend laterally from the sleeve and adapted to act as a pivot for the compass. The upper side of the sleeve is also provided with a boss 19 and screw threaded through the said boss, is an adjusting pin 20 movable to engage the upper side of the bar 10, for holding the sleeve in fixed position thereon. rIhe sleeve 20, intermediate its ends, is provided with an annular milled enlargement 21 which may be readily grasped by the iingers to operate the pin and at its upper extremity, is formed with a reduced terminal 22. Formed in the upper side of the sleeve 16, is a longitudinally extending opening 23 through which the scale upon the bar 10 may be observed, one end of the said opening being arranged in a plane passing through the axis of the stud 1S.

It will now be seen that by properly operating the pin 20, the sleeve 16 may be readily adjusted longitudinally upon the bar 10 and in operating the compass, the reduced terminal 22 of the pin may be grasped by the lingers of the left hand while the right hand may then be employed to swing the marking element about the stud 18. If desired, the disk of the marking element may be provided with radial teeth, so that the marking element will describe a dotted line whereas, if desired, the marking element may be fixed to score the work in the manner previously set forth.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. A device of the character described including a bar, a marking element carried by the bar, a sleeve movable longitudinally upon the bar, a pivot stud connected to said sleeve, and a pin carried by the sleeve and terminating in a set screw adjustable upon the sleeve to engage the bar for holding` the sleeve in fixed position with the said pin adapted to provide a handle for supporting the bar in working position co-incident with the movement of the said bar for swinging the marking element about said stud.

2. A device of the character described including a bar, a marking element carried thereby, a sleeve movable longitudinally upon the bar, a pivot stud screw threaded into said sleeve, and a pin having a reduced upper terminal and terminating in a set screw adjustable upon the sleeve to engage the bar for holding` the sleeve in iXed position with the said reduced terminal of the pin adapted to provide a handle for supporting the bar in working position co-incident with the movement of the said bar to swing the marking element about the said stud.

3. A device of the character described including a bar provided at one end with an opening, a marking element rotatably mounted in said opening, a set screw adjust able through one end of the bar to project into the said opening and engage the marking element for holding it against rotation,

a sleeve movable longitudinally upon the bar, and a pin carried by the sleeve and adjustable to engage the bar for holding the sleeve in fixed position.

t. A device of the character described including a bar provided with an opening, a set screw adjustable through one end of the bar to project into said opening, a marking element having trunnions one engaging the bar and the other engaged by said set screw for rotatably supporting the marking element, a sleeve movable longitudinally upon the bar and provided with a pivot stud to cooperate with the marking element, and a pin adjustable upon the sleeve to engage the bar for holding the sleeve in fixed position.

5. A device of the character described including a bar, a rotatable marking element journaled at one side upon the bar, means adjustable upon the bar and providing a bearing for said marking element upon its opposite side, and a sleeve carried by the bar and provided with a pivot stud to cooperate with the said marking element.

6. A device of the character described including a bar, a marking element carried by the bar, a sleeve mounted upon the bar and provided with a pivot stud adapted to cooperate with said marking element, and an upstanding pin carried by said sleeve and adapted to provide a handle for supporting the bar in working position co-incident with the movement of the said bar to swing the marking element about the said stud.

In testimony whereof I aix my signature.

GEORGE F. VHEELER. [1.. s]

Copies o1 this patent may be obtained for ve cents each, by addressing the Gummissioner of Patents, Washington, D. C. 

